Cube book



FIG. 1 is a front perspective view of a cube book showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a rear side elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front perspective view thereof showing it in an open position with the pages extended; and

FIG. 6 is a top plan view thereof showing it in open position with the pages extended. 

The ornamental design for a cube book, as shown and described. 